Signal generation apparatus for frequency conversion in...

Details Signal generation apparatus for frequency conversion in... Signal generation apparatus for frequency conversion in...

2008-03-11

2009-12-15

Zweizig, Jeffrey S (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

Reexamination Certificate

active

07633325

ABSTRACT:
A signal generation apparatus includes a signal generation portion and a phase compensator. The phase compensator generates a phase error control signal that maintains a phase difference between the in-phase and quadrature-phase signals generated by the signal generation portion. The phase compensator includes an offset compensator and a delay compensator. The offset compensator is set to compensate for an offset voltage through the phase compensator. The delay compensator is set to compensate for a difference of delays through paths for the in-phase and quadrature-phase signals within the phase compensator.

REFERENCES:
patent: 6054883 (2000-04-01), Ishihara
patent: 6356131 (2002-03-01), Kuwano
patent: 6560449 (2003-05-01), Liu
patent: 6747499 (2004-06-01), Sanduleanu
patent: 7116728 (2006-10-01), McCune, Jr.
Korean Patent Application No. 1019990023981 to Choi et al., having Publication date of Jan. 15, 2001 (w/ English Abstract page).
Japanese Patent Application No. 09-069798 to Junya, having Publication date of Oct. 9, 1998 (w/ English Abstract page).

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